Trainer is useless for core, thats what I need, had rollerscyears ago and they were perfect cfor refining riding style, core, everything. Static trainers, any I have had are boeing, not interested in video game style apps. Core strength, riding style, thats what Im looking for. The Galaxia are very rugged. Got an aftermarket resistance ubnit coming. Faling that I have a 12 volts mag unit that will fit